I have inherited a SUN BLADE chassis with 6 T6320 server modules, in which there is only 1 root disk in all of them. I need to do a backup of the root disk in case those disk crash. But there is no backup device attached to it. So please can I have some ideas how to solve this problem.

Right then. Create a NFS share from the other box and mount it on this one.

Then use

Code:

fssnap

command to snapshot the root filesysytem, and then

Code:

ufsdump

command giving the remote NFS as the target for the dump. Job done.

Remember to delete the snapshot afterwards.
(You could script all this stuff.)

If you need to restore after a crash, boot from cd into single user, manually plumb, set ip address and mask, and 'up' the network interface, mount the remote NFS, 'newfs' your local root filesysytem, and ufsrestore the whole thing.

Obviously I don't know your experience level and the above may be too brief. Any questions just ask.

EXTRA NOTE: When you execute 'fssnap' this will output a special device name for the snapshot. This is the device you put in the ufsdump command line (NOT /dev/dsk/c0t0d0s0 or /). This special device reads the frozen snapshot of the filesysytem.